Safety razor



Dec. 1924- 1,519,185

\ A. BERTRY SAFETY RAZOR Filed Oct. 9, 1922 Fig.1

Patented Dec. 16, 1924.

UNITED STATES ANTOINE BERTRY, OF PARIS, FRANCE.

SAFETY RAZOR.

Application filed October 9, 1922. Serial No. 598,453.

To all whom it may concern:

Be it known that I, ANTOINE BERTRY, residing at 19 Rue de Richelieu, Paris, France, have invented certain new and useful Improvements in Safety Razors, of which the following is a complete description.

When using a safety razor of any of the known types for shaving purposes, the hand of the operator, whilst holding the handle of the razor, directs the cutting edge of the blade towards the skin according to the cutting angle which he finds the most efficacious; after having empirically determined such an angle, the operator exerts rectilinear tractional stresses on the razor, thus causing the latter to act after the fashion of a rake. Such operation causes a slight painful feeling due to the cutting edge of the blade not working equally.

In order to perform a better and painless shaving, it may be easily understood that the cutting edge of the blade ought to occupy an oblique position in relation to the direction of the tractional stress. In other terms the cutting line oughtto be oblique with respect to the direction of the tractional stresses.

In the sundry safety razors constructed heretofore, the direction of the tractional stress absolutely depends on the one of the handle, the latter being always perpendicular to the cutting edge of the blade. As a result of this, the said edge works im properly thus compelling the operator in the act of shaving to cause the cutting edge to pass over the very same portion of the skin repeatedly if he wishes to obtain a I thoroughly satisfactory shaving.

The present invention has for its primary object to provide safety razors either of the single cutting edge type or of the double cutting edge type with a device for securing the handle on the blade carrier, which device allows of an oblique tractional stress to be exerted by means of the said handle on the cutting edge of the blade.

Further objects of the invention are in part obvious and in part will appear more in detail hereinafter.

The invention comprises the construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawing which represents one suitable embodiment of the invention.

Figure 1 is a diagram showing the line of the cutting edge a b and the direction of the traction imparted by the handle 0 cl.

Figures 2 and 3 are respectively front and edge views of an ordinary safety razor blade carrier having a single cutting edge a I), on which carrier is movably secured the handle so that the said handle may be inclined with respect to the said carrier. Figure 2 shows the handle in an inclined position.

Figure 4 is a plan view of the carrier which is formed with a spherical socket in which a terminal rounded head or ball connected to the handle can move.

Figure 5 is a sectional view on the line .r-00 of Fig. 1 of a fragment of the carrier, in the neighborhood of the said socket, showing the connection between the handle and the round head or ball.

Figure 6 shows the connection of the movable handle assuming same to be mounted on a safety razor having two cutting edges,

the comb-plate, clamping plate and fastening means of the handle on the said combplat'e being represented in section, the handle being positioned obliquely with respect to the line of the cut-ting edges.

Figure 7 shows in side elevation the comb plate, the blade clamping plate and the handle, assuming that the latter is separated from the blade carrier for the sake of more clearness.

Figure 8 shows in plan and in section on the line g g of Fig. 8 the blade clamping plate seen from the side facing the handle.

Figure 9 shows in plan and in section on the line of Fig. 9 the comb-plate seen from the side facing the handle.

In the diagram shewn in Figure 1, a b designate the line of the cutting edge; 0 (Z designate the direction of the handle of the razor. Said handle is rigidly positioned at A at right angles to the cutting edge line a b, that is to say in the operative position of razors constructed and used hitherto. The handle as indicated at B or C is set obliquely wi h respect to the line a b to show the novel way of applying the tractional stress to perform the shaving according to the invention. The handle occupies the B position when it is being held by the operators right hand and it occupies the C position when held by the operators left hand.

Referring to the construction represented in Figures 2, 3, 4 and 5, in order to render it possible to position the handle 0 (Z so that its direction as indicated by the line w-w, obliquely cuts the cutting edge line a b, the following arrangement of parts is employed V The lower plate 1 of the ordinary carrier for a single cutting edge blade extending from a to 6 (Figs. 2 to 5) is stamped at 2 in its central part to form a spherical socket, such socket being intended for accommodating the round head or terminal ball of the handle 0 (Z. The inner wall of this socket is slotted at 3 in parallelism with the line a b of the cutting edge. In said socket is positioned a correspondingly curved head or ball 4:. Such head or ball is provided with a threaded depending pin 5 which is screwed into the threaded bore 6 provided in the extremity of the handle 0 (Z. v The portion of such pin 5 adjacent to the head 4 is formed with two flattened surfaces 7 (see Fig. 4) and is slightly inferior in size to the width of the slot 3 through which it loosely passes. The end 0 of the handle 0 d is bored at 6, as above described, toaccommodate the threaded pin 5 and the mouth of said bore 6 has the same curvature as the external convex wall of the socket 2 since it must freely slide against that wall Whilst the reduced part 7 of the pin 5 moves in the slot 3.

Through a suitable slight unscrewing of the handle 0 (Z, it becomes possible to shift the handle either to the right or to the left 1n a plane substantially parallel to the line a b of the cutting edge and therefore cause it to be set obliquely. As soon as the handle has attained the desired obliquity, it is only suffic ent to screw it up to set it firmly in position. The cutting edge a b is then oblique to the direction of the tractional stress represented by the longitudinal axis of the handle 0 d. Referring now to the construction shewn in Figures 6, 7, 8 and 9 which corresponds to the case of ordinary safety razors having carriers for double edged blades, 7) designating the comb plate, 7 the blade clamping plate, 1* the pins formed integral with said plate g which slide in openings .9 formed. in the comb-plate, the handle or] is' rendered movable w th respect to thecomb-plate and the clamping plate constituting the blade carrier as is described hereinafter The handle is formed at its extremity c with a spherical Socket the pole or apex of which coincides with the axis of a threaded bore 6 extending over a portion of the length of the handle a (Z. The lower concave face of the comb-plate 79 (Fig. 9) is centrally stamped to form a spherically shaped socket 2; such socket is slotted at 3 in parallelism to the toothed edges of said comb-plate p and to both cutting edges of the blade. Against the outer or convex face of the protuberance formed on the opposite or convex face of the comb-plate by the stamping of the said socket 2 slide the lips of the socket formed in the extremity c of the handle. The clamping plate 9 (Fig. 8') is also depressed centrally on its concave face and this depression 20 is slotted at 30 in parallelism to the longitudinal edges of the said plate Q. A threaded pin' 5 screwed in the bore 6 loosely passes through said slot 30 and opposite the latter said pin 5 is formed with two flat parallel surfaces 7. The pin 5 is terminated by a rounded head, the curvilinear lower face of which rests on the upper face of the depression 20.

As the handle 0 d is screwed on the pin 5, it is only necessary to incline it either to the right or to the left from its perpendicular position with respect to the plane passing through the centre of the comb-plate p to bring it to its inclined operative position. When in this position, through suitable screwing up of the handle, the lips of the socket formed" in the extremity 0 of said handle are clamped against the convex face of the protuberance formed by the socket 2, when the handle is firmly set in its operative position. 7

.What I claim and desire to secure by Letters Patent is 1. In a safety razor a handle, a plate provided in its center with a substantially semispherical socket, presenting its outer convex face towards the handle and provided with a slot parallel to the cutting edge of the blade, a threaded pin having a substantially spherical head which rests on the inn'er concave face of the said socket having a reduced portion to pass through the said slot and being threaded in the end of the handle, said handle end having a socket whose curvature matches that of the outer convex face of the first named socket, whereby the handle may be shifted in a plane parallel to the said cutting edge and thereafter clamped in any oblique position.

2. In a safety razor, a handle, a clamping plate provided in its center with a spherical depression whose convex face protrudes underneath the said plate, said depression having a slot parallel to the cutting edges of the blade, a comb-plate formed in its center with a spherical socket whose. convex face protrudes underneath the said comb-plate, said socket having a slot parallel to the said cutting edges, a threaded pin terminated by a substantially spherical head which rests of the outer convex face of the first named on the concave face of said depression, said socket, whereby the handle may be shifted 10 pin having two flattened surfaces to reduce in a plane parallel to the cutting edges of the same to loosely engage the said slots and the blade and thereafter firmly clamped in being screwed at its free end into a bore any oblique position.

formed in the adjacent extremity of the han- In testimony whereof I have signed my dle, said bore having lips forming a socket name to this specification.

whose curvature matches with the curvature ANTOINE BERTRY. 

